//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license.
//
// Microsoft Bot Framework: http://botframework.com
//
// Bot Framework Emulator Github:
// https://github.com/Microsoft/BotFramwork-Emulator
//
// Copyright (c) Microsoft Corporation
// All rights reserved.
//
// MIT License:
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

import { Next, Request, Response } from 'restify';
import { NOT_FOUND, OK } from 'http-status-codes';
import { User } from '@bfemulator/sdk-shared';

import { ServerState } from '../../../state/serverState';

/* updates the conversation object */
export function createUpdateConversationHandler(state: ServerState) {
  return (req: Request, res: Response, next: Next): any => {
    const currentConversationId = req.params.conversationId;
    const { conversationId, userId } = req.body;
    const currentConversation = state.conversations.conversationById(currentConversationId);
    if (!currentConversationId) {
      res.send(NOT_FOUND);
      return next();
    }

    // update the conversation object and reset as much as we can to resemble a new conversation
    state.conversations.deleteConversation(currentConversationId);
    currentConversation.conversationId = conversationId;
    currentConversation.user.id = userId;
    const user: User = currentConversation.members.find(member => member.name === 'User');
    if (!user) {
      return next(new Error(`Conversation ${currentConversationId} is missing the user in the members array.`));
    }
    user.id = userId;
    currentConversation.normalize();
    currentConversation.nextWatermark = 0;
    state.conversations.conversations[conversationId] = currentConversation;

    res.send(OK, {
      // can't return the conversation object because event emitters are circular JSON
      botEndpoint: currentConversation.botEndpoint,
      conversationId: currentConversation.conversationId,
      user: currentConversation.user,
      mode: currentConversation.mode,
      members: currentConversation.members,
      nextWatermark: currentConversation.nextWatermark,
    });
    next();
  };
}
